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' Nine STATES ATENT rr cn.

VVALLACETELMER TILLINGHAST,".OF EAST GREEN VVIOI-I, RHODE ISLANDQOIL-CUP.

SPECIFICATION forming part of neee i raieene 592,179, dated October 19,1897. Application filed October lO, 1896. Serial No. 608,445. (Nomodel.)

To aZZ whom it may concern:

Be it known that I, WALLACE ELMER TIL- LINGHAs'r, of East Greenwich, inthe county of Kent and State of Rhode Island, have invented a new andImproved 'Air-Valve for Oil-Cups, of which the following is a full,clear, and exact description.

The object of the invention is to provide a new and improved vent orauxiliary valve for oil-cups which is especially applicable to thatclass of oil-cups designed for use on crankpins and other rapidly-movingparts ofmachinery, and which is arranged to insure a steady fiow of oilto the part to be lubricated without danger of forming a vacuum in thecup to retard the flow of oil.

. My invention consists of a valve having a casing which is formed witha flared or bellshaped mouth, the specific construction and arrangementof the same being first described, and then particularly pointed out inthe claim.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which- Figure 1 is a side elevation of an oil-cupwith my improvement applied. Fig. 2 is a plan view of the same, and Fig.3 is a sectional side elevation of the same on the line 3 3 of Fig. 2.

The oil-cup shown in the different figures and to which I preferablyapply my improved auxiliary valve is provided with the usual cylinder A,held between the upper and lower heads B and B, fitted on a centraltubular stem 0, secured at its lower end on the base D, by which the cupis fastened to the part to be lubricated. This stem 0 is formed with theusual openings 0 for the lubricant to pass from the cylinder A into thesaid stem and to and through a valve-seat D, formed in the base'D, tothen pass to the part to be lubricated, the amount of oil passingthrough the valve-seat D being regulated by the usual needle-valve E,held in the tubular stem 0 and adjustable by a nut E, screwing on theupper outer end of the stem. A spring E presses on the needle-valve E tohold the same in an open position. On the upper head B of this oil-cupis placed my improved vent or air-valve F, adapted to open automaticallyand positively in an inward direction, so that no vacuum whatever canform within the 'der A, but forced therein.

cup when the ,oil flows therefrom, and consequently a steady flow of thelubricant to the part to be lubricated is insured. This valve F isprovided witha casing F, having a portion bell-shaped, the peculiaradvantage of this shape, of easing being hereinafter set forth. Thecasing F has its end below the bell-shaped portion screwed or otherwisefastened in the head B, and it will thus be seen that it can be easilyapplied to any oil-cup of this character, so as to extend partly intothe cylinder A and partly outside of the cup, as best seen in Fig. 3. Inthe casing, adjacent the bell-shaped portion and just below the same, issecured the valve'seat F normally closed by a valve G, seated on thelowerface of the valve-seat and held to its seat by the spring G,encircling the spindle of the valve, said spindle being loosely receivedin an opening in the valve-seat, and extending up into the bell-shapedportion of the casing to within a short distance of the top of thecasing. Lateral ports F establish communication between the casing andthe interior of the cylinder A.

It will be observed that a very important and advantageous part of myinvention is the large bell-shaped upper part of the valvecasing, forwhen an oil-cup employing my device is placed on the crankpin of anengine making rapid revolutions said bell-shaped portion of thevalve-casing acts as a funnel on the upstroke by reason of its largearea and concentrates the air at the opening in the valve-seat, thusforcing the air to unseat the valve and giving to the valve the positiveproperties of a pump, by which the air is not merely admitted to theinterior of the cylin- When the crankpin passes the center and starts inthe downward direction, the valve closes by the action of the spring,the large area of the bell-shaped casing being no longer forced againstthe air. Hence in my device one is not dependent entirely upon thevacuum within the cylinder A to unseat the valve and admit air, but myvalve, as has been shown, is positive in its action and effectuallyinsures a constant flow of oil to the part to belubricated. Further, itwill be noted that the stem or spindle of the valve extends up into thebell-shaped portion, so that while it is protected from accidentaldisturbance, a finger can be easily inserted in the casing to depressthe stem against the action of the spring whenever it is desired tomanually unseat the valve, and, further, the stem of the valve isloosely received in the valve-seat, so that the air can get around thestem and is concentrated directly upon the valve to unseat the same.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

The combination with an oil-cup for rapidly-moving parts of machineryand provided with the cylinder, inlet and outlet openings for the oil,the stem, and upper and lower heads; of the herein-described air-valve,provided with a casing inserted in an opening in the upper headextending partly within and partly without the cylinder and providedwith lateral ports opening into the cylinder, a valve-seat in saidcasing, a valve on said valve-seat and arranged to open inwardly, and aspring in said casing below the valve and normally holding said Valveupon its seat,the said valve-casin g being formed above the valve-seatwith an open flared or hellshaped mouth into which the stem of the valveis extended, whereby the valve-casing acts as a funnel and collects andconcentrates the air directly upon the Valve to unseat the same when thecup is moving upwardly, as and for the purpose set forth.

WALLACE ELMER 'llLLlNGllAS'l. Witnesses:

EVA J. T. CONGDON, J OHN L. CONGDON.

